Simple ROAS (Router-on-a-Stick) setup and configuration in GNS3
216 بار بازدید -
پارسال
-
Router on a Stick (RoAS)
Router on a Stick (RoAS) is a networking technique used to enable inter-VLAN communication in a network where a single physical router interface is connected to a switch. It is a configuration method that allows a router to handle traffic between multiple VLANs (Virtual Local Area Networks) by utilizing subinterfaces.
In a typical network setup, each VLAN is associated with a specific subnet, and hosts within the same VLAN can communicate with each other directly. However, if hosts in different VLANs need to communicate, a layer 3 device, such as a router, is required to facilitate the communication.
With a router on a stick configuration, a single physical interface of the router is connected to a switch, typically through a trunk port. The trunk port carries traffic from multiple VLANs using VLAN tagging, where each VLAN is identified by a unique VLAN ID. On the router, subinterfaces are created for each VLAN, and each subinterface is associated with a specific VLAN ID.
The router's physical interface is configured as a trunk port, allowing it to receive traffic from multiple VLANs. When the router receives a packet with a specific VLAN ID, it processes the packet according to the configuration of the corresponding subinterface. This enables the router to perform inter-VLAN routing and forward packets between different VLANs.
Router on a Stick is often used in scenarios where there are resource constraints or a limited number of physical interfaces on the router. It allows for efficient use of a single router interface to handle traffic between multiple VLANs, reducing the need for additional physical interfaces and simplifying the network design.
In a typical network setup, each VLAN is associated with a specific subnet, and hosts within the same VLAN can communicate with each other directly. However, if hosts in different VLANs need to communicate, a layer 3 device, such as a router, is required to facilitate the communication.
With a router on a stick configuration, a single physical interface of the router is connected to a switch, typically through a trunk port. The trunk port carries traffic from multiple VLANs using VLAN tagging, where each VLAN is identified by a unique VLAN ID. On the router, subinterfaces are created for each VLAN, and each subinterface is associated with a specific VLAN ID.
The router's physical interface is configured as a trunk port, allowing it to receive traffic from multiple VLANs. When the router receives a packet with a specific VLAN ID, it processes the packet according to the configuration of the corresponding subinterface. This enables the router to perform inter-VLAN routing and forward packets between different VLANs.
Router on a Stick is often used in scenarios where there are resource constraints or a limited number of physical interfaces on the router. It allows for efficient use of a single router interface to handle traffic between multiple VLANs, reducing the need for additional physical interfaces and simplifying the network design.
پارسال
در تاریخ 1402/03/05 منتشر شده
است.
216
بـار بازدید شده